He looked at me carefully as a scout considers a stranger—not as a menial should lift his eyes to his divinely appointed superior. “I wonder why,” he said just above the breath that he drew.
This is from "They" by Rudyard Kipling.
http://www.telelib.com/authors/K/KiplingRudyard/prose/TrafficsDiscoveries/they.html
I don't understand the meaning of---
he said just above the breath that he drew.
I am glad if someone would kindly teach me.